@woosh/meep-engine/src/core/geom/3d/mat4/m4_make_scale.js

Pure JavaScript game engine. Fully featured and production ready.

/**
 * Create a 4x4 matrix that corresponds to scaling transform
 *
 * @param {ArrayLike<number>} output 4x4 matrix output will be written here
 * @param {ArrayLike<number>} scale 3d vector
 * @returns {ArrayLike<number>} `output` parameter returned for convenience
 */
export function m4_make_scale(output, scale) {

    output[0] = scale[0]
    output[1] = 0
    output[2] = 0
    output[3] = 0

    output[4] = 0
    output[5] = scale[1]
    output[6] = 0
    output[7] = 0

    output[8] = 0
    output[9] = 0
    output[10] = scale[2]
    output[11] = 0

    output[12] = 0
    output[13] = 0
    output[14] = 0
    output[15] = 1

    return output;
}